Rotary pump.



J. R. KINNBY;

ROTARY PUMP. 1 APPLICATION I'ILED JAN. 18, 1911.

a snnnws-sanm 1.

Patented Oct. 24, 1911.

J. R. KIN-HEY.

ROTARY PUMP.

APPLICATION FILED JAN; 16, 1911.

1,007,033. Patented 001211911.

1 1 y/m/xz v WE'tnesses: 1 Lwenlor: dram 1?. W Ju 1110111118 Q by JUSTUSKINNEY, OF BOSTON, MASSACHUSETTS.

ROTARY PUMP.

Specification of Letters Patent.

Patented Oct. 24, 1911.

Application filed January 16, .1911. Serial No. 602,999.

To all whom 'it may concern;

Be it known that I, J USTUS R. KINNEY, a citizen of the United States ofAmerica, and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements inRotary Pumps, of which the following is a specification.

This invention relates to rotary pumps, and has for its object theproduction of a pump of simple construction having comparatively fewoperating parts, special provision being made whereby any liability toclog during its operation by the presence of foreign substances withinthe piston chamber is entirely obviated.

Another object of the invention is to provide a means whereby the fluidmay circulate through the pump when not in operation.

The invention consists in certain novel features of construction andarrangement of parts which will be readily understood by reference tothe description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents an elevation of a pumpembodying thefeatures of the present invention with the end plate removed therefrom.Fig. 2 represents a vertical section of the same, the cutting planebeing on line 22 on Fig. 1. Fig. 3 represents an elevation of a portionof the periphery of the rotor, showing the staggered ribs thereon, andFig. 4 represents a section of a portion of the pump, the cutting planebeing on line 44 on Fig; 1.

Similar characters designate like parts throughout the several figuresof the drawmgs.

In the drawings, 10 represents a casing supported by the feet 11, andhaving a cylindrical piston chamber 12 and inlet and outlet compartments13 and 14 respectively. An inlet pipe 15 leads to the inlet compartmentl3 and a pipe 16 from the outlet compartment 14. A passage 17 forms ameans of communication between the inlet compartment 13 and the pistonchamber 12, while a similar passage 18 forms a means of communicationbetween the piston chamber 12 and the outlet compartment 14. Extendingthrough the piston chamber 12 is a shaft 19, revoluble in bearings 19*in the casing 10 and end plate 10* and havin formed thereon theeccentric 20 to which is fitted the annular piston or rotor 21, one partof the peripheryof which is adapted tobe iin contact with thecylindrical wall of the piston chamber 12 throughout the rotation of theeccentric 20. Radiating from this piston or rotor 21 is a blade 22, theouter end-of which extends into a chamber 23 formed in the casing 10. Insuitable pockets 24 formed in the casing 10 on either side of the blade22 are cylindrical members 25, one portion of the peripheries of whichbear upon the opposite faces of the radial blade 22, therebyv preventing the direct passage of fluid from the in let compartment 13' to theoutlet compart-; ment 14. It is obvious, therefore, that when the'pumpis in operation, no fluid can pass from the inlet compartment 13 to theoutlet compartment 14, except that which is forced through the pistonchamber 12 by therevolution of the rotor 21. The continuousreciprocation of the radial member 22 in contact with the cylindricalbearing members 25 will gradually wear the surfaces of these members,and it'is therefore necessary that some provision be made whereby whenthis wearing occurs a new bearing surface maybe presented. This isaccomplished by providin'g each cylindrical member 25 with some meansfor rotating, such as the slot 26', which is adapted to receive theendof an ordinary screw driver,by which itmaybeturned slightly about itsaxis until another unworn portion of its periphery is brought oppositethe face of the radial member 22. These cylindrical members 25 fit intothe pockets 24 so tightly that the reciprocation of the radial blade 22will not turn them in the pockets, but at the same time they are not sotightly fitted to the pockets but that they may be turned radially bymeans of a screw driver when sufficient force is applied thereto. Thismakes a very convenient form of packing the blade 22 and preventing anyleakage thereby. 1n the rotation of the eccentric 22, the annular pistonor rotor 21 moves thereon, and in order to lubricate the surfacesbetween the periphery of the eccentric 20 and the inner cylindrical wallof the piston or rotor 21, the latter is provided with two grooves 27 inthe cylindrical wall thereof, which commu-.

nicate by means of passages 28 with the piston chamber 12 directlyopposite the inlet and outlet passages 17 and 18. It is obvious,therefore, that in whichever direction the rotor is revolved, a certainamount of the fluid entering the piston chamber on either side of theblade 22 will be admitted through a passage 28 into a groove 27 andlubricate the contacting surfaces between the eccenbetween the peripheryof the rotor and the inner wall of the piston chamber and prevent thefurther operation of the pump. Naturally, this is a serious objection,and as in most cases the liquid being admitted con-* tains sediment orother foreign substances, it is essential that some provision be made inthe pump to overcome these objections and prevent the rotor from beingclogged.

This objection has been wholly overcome by providing the periphery ofthe rotor 21 with a plurallty of radial ribs 29. Where the rotor-isprovided with these ribs 29, and any a sand or other foreign substancesare carried into the piston chamber 12, such substances will enter thetransverse grooves 30 formed by the ribs 29, and will be carried thereinuntil they pass the point of contact between the rotor and the chamberwall.

It has been found in practice that where the ribs 29 are used that anyfluid of any nature can be readily pumped notwithstanding the amount offoreign substances contained therein, and in no case is any cloggingliable to occur which will stop the rotation of the rotor, as has beenexperienced when a continuous cylindrical periphery was used. This formsa very. important part of the present invention, as it makes a mosteffective pump which can be used for all classes of work. When the pumpis used for some classes of work, however, as for instance in connectionwith motor cars, it has been found advisable to provide some meanswhereby there may be a circulation of the fluid through the pump evenwhen the rotor is at rest. Thisis accomplished by making the transverseblades 29 of less length than the width of the rotor and staggering themso that every alternate rib 29 extends from an opposite face of saidrotor, thereby leaving the connecting passages 31 between the grooves30. By this construction an indirect passage through the grooves '30 andthe connecting passages 31 is made,

through which the fluid may circulate when the pump is not operating. Aseach rib overlaps the one preceding it when the rotor is in operationthe effect upon the substances being pumped is practically the same aswould be the case if each blade extended from one face of the rotor toits op posite face.

It is believed that the operation and many advantages of the inventionwill be thoroughly understood from the foregoing.

Having thus described my invention, I claim:

1. In a device of the class described, the combination with a casinghaving a cylindrical piston chamber; and a rotor eccentricallypositioned therein, and provided with a plurality of transverseperipheral ribs, the ends of which are adapted to cont-act success1velywith the cylindrical wall of said casing during the rotation thereof.

2. In a device of the class described, the combination with acasinghavinga cylindri- 1 cal piston chamber; and a rotor eccentricallypositioned therein, and provided with a plurality of transverseperipheral ribs the ends of which are ada ted tocontact with thecylindrical wall 0 said casing during the rotation thereof, said ribsbeing of less .len h than the width of said rotor and ex ten ingalternately from opposite faces thereof.

3. In a device of the class described, the combination with'a casinghaving a cylindrical piston chamber and inlet and outlet passagesthereto; arotor eccentrically positioned within said chamber andprovided with a plurality of transverse peripheral ribs, the ends ofwhich are adapted to contact successively with the cylindrical wall ofsaid. chamber; and a radial blade on said rotor interposed between saidinlet and outlet passages.

4. In a device of the class described, the combination with a casinghaving a cylindrical piston chamber and inlet and outlet passagesthereto; a rotor eccentrically positioned within said chamber andprovided with a plurality of transverse peripheral ribs, the ends ofwhich are adapted to contact with the cylindrical wall of said chamber,said ribs being of less length than the width of said rotor andextending alter-- nately from opposite faces thereof; and a radial bladeon said rotor interposed between said inlet and outlet passages.

5. In a device of the class described, the combination with a casinghaving a cylindrical piston chamber and inlet and outlet passagesthereto; an eccentric revoluble in said chamber; an annular rotor 'onsaid eccentric provided with a plurality ,of trans verse peripheral ribsthe ends of which are adapted to contact successively with thecylindrical wall of said chamber during the rotation thereof; and ablade radiating from said rotor and interposed between said inlet andoutlet passages.

6. In a device of the class descsribed, the

passages thereto; an eccentric revoluble in said chamber an annularrotor on said eccentric provi ed with a pluralit of transof said chamberduring the rotation thereof, said ribs being of less length than thewidth of said rotor and extending alternately from opposite facesthereof; and a blade radiating from said rotor and interposed betweensaid inlet'and outlet passages.

7. In a device of the class described, the combination with a casinghaving a cylindrical piston chamberand a rotor eccentrically mounted insald chamber and provided with a plurality of transverse peripheralworking members, having indirect passages therethrough for thecirculation of fluid when said rotor is at rest.

8. In adevice of the class described, the combination with a casinghaving a cylindrical piston chamberand a rotor eccentrically mounted insaldchamber and provided with a plurality of transverse peripheralworking members, having indirect pa ssages therethrough for thecirculation of fluid when said rotor is at rest, and provided withtransverse grooves in itsinner wall communicating with said piston"chamber through passagesin saidrotor opposite said inlet and outletpassages. V

9. In a device of the class described, the combination with a casinghaving a cylindrical piston chamber and inlet and outlet passagesthereto; a rotor eccentrically positioned therein and provided with aradial" blade interposed between said inlet and outlet passages; andacylindrical member in V a pocket on each, side of said blade andcontacting therewith each adapted tobe rotated about its axis to presenta new bearing surface for said blade.

10. In a device of the class described, the

combination with a casing having a cylindrical piston chamber and inletand outlet passages thereto; arotoreccentricallypositioned therein andprovided with a radial blade interposed between said inlet and outletpassages; a cylindrical member in a pocket on each side of said bladeand con-.

tacting therewith; and meansv for rotating said embers to present a newbearing surface or saidblade.

11; In a device of the class described, the combination with a casinghaving a cylindrical piston chamber; and a rotor 'eccentricallypositioned therein, and provided with a plurality of semi-cylindricaldepressions in those portions of the periphery thereof which are adaptedto contact successively with the cylindrical wall of said casing duringthe rotation of said rotor.

Signed by me at 4 Post Oflice Sq., this 10th day of January, 1911.

JUSTUS R. KINNEY. Witnesses: v

WALTER E. LoMBARn', NATHAN C. LOMBARD.

